Powder metallurgy aviation brake material for large-scale airplane and producing method thereof

A brake material and powder metallurgy technology, applied in the field of new copper-based powder metallurgy aviation brake materials, can solve the problems of short service life, insufficient braking force, poor reliability, etc., and achieve the effect of long service life and sufficient response

Inactive Publication Date: 2009-12-09
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used domestic powder metallurgy aviation brake materials have technical defects such as insufficient braking force, poor reliability and short service life when applied to new aircraft.

Method used

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  • Powder metallurgy aviation brake material for large-scale airplane and producing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Boeing 737-700 aircraft domestic brake pair

[0028] Brake material components are: 13% iron, 12% graphite, 6% sea sand, 1% tin, 2% nickel, 4% silicon carbide, 4% alumina, 4% molybdenum disulfide, 54% copper.

[0029] The manufacturing process is as follows:

[0030] Each component is mixed evenly according to the proportion, then mixed with aviation kerosene and mixed evenly with a V-shaped mixer; the mixture is formed into a powder compact with a pressing pressure of 500MPa; the steel plate is processed into a steel bowl with a thickness of 1.5mm No. 45, plated with matte nickel, The thickness of the coating is 10-20 μm; the pressing and sintering process of the compact is as follows: heating up for 2 hours, pressurizing 1.0 MPa in the initial stage of heating up, and pressing 1.5 MPa after 700 ° C. The heat preservation temperature is 980°C, the heat preservation pressure is 2.0MPa, and the heat preservation is 3 hours, with hydrogen protection.

[00...

Embodiment 2

[0033] Embodiment 2: Boeing 737-800 aircraft domestic brake pair

[0034] Brake material components are: 15% iron, 10% graphite, 9% sea sand, 1% tin, 1% nickel, 2% silicon carbide, 2% alumina, 4% molybdenum disulfide, 57% copper.

[0035] The manufacturing process is as follows:

[0036] The components are mixed evenly according to the ratio, then mixed with aviation kerosene and mixed evenly with a V-shaped mixer; the mixture is formed into a powder compact with a pressing pressure of 500Mpa; the steel plate is processed into a steel bowl with a thickness of 1.5mm No. 45, plated with matte nickel, The thickness of the coating is 10-20 μm; the pressing and sintering process of the compact is as follows: heating up for 3 hours, pressing 1.0 MPa in the initial stage of heating up, and pressing 2.0 MPa after 700 ° C. The heat preservation temperature is 1000°C, the heat preservation pressure is 2.5MPa, and the heat preservation is 3 hours, with hydrogen protection.

[0037] Fri...

Embodiment 3

[0039] Embodiment 3: Boeing 737-500 aircraft domestic brake pair

[0040] Brake material components are: 8% iron, 8% graphite, 4% sea sand, 1% tin, 1% nickel, 2% silicon carbide, 2% alumina, 2% molybdenum disulfide, 72% copper.

[0041] The manufacturing process is as follows:

[0042] Each component is mixed evenly according to the proportion, then mixed with aviation kerosene and mixed evenly with a V-shaped mixer; the mixture is formed into a powder compact with a pressing pressure of 400MPa; the steel bowl is processed into a steel bowl with a thickness of 1.5mm No. 45 steel plate, plated with matte nickel, The thickness of the coating is 10-20 μm; the pressurized sintering process of the compact is as follows: heating up for 3 hours, pressurizing at the initial stage of heating at 1.0 MPa, and then pressing at 1.5 MPa after 500°C. The heat preservation temperature is 1020°C, the heat preservation pressure is 2.0MPa, and the heat preservation is 3 hours, with hydrogen pro...

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Abstract

The invention relates to powder metallurgy aviation brake material used for a large scale aircraft. The brake material comprises the following components calculated according to the mass percent: 8 to 18 percent of ferrum, 8 to 16 percent of graphite, 4 to 10 percent of dune sand, 1 to 5 percent of tin, 1 to 3 percent of nickel, 1 to 10 percent of SiC+Al2O3, 1 to 5 percent of molybdenum disulphide, and 50 to 75 percent of copper. The components are mixed evenly and then aviation kerosene is added, the compression sintering process is as follows: the temperature is elevated for two to four hours and held for two to three hours, the holding temperature is 950 to 1020 DEG C, the thermal insulated pressure is 1.5 to 3.0 MPa, and the sintering is protected under the hydrogen atmosphere. The average friction coefficient mu is equal to 0.20 to 0.30, the attrition performance, the system compatibility and the service life, etc. reach or exceed in the performance indexes of an import brake pair.

Description

Technical field: [0001] The invention relates to a powder metallurgy aviation brake material applied to large aircraft and a preparation process thereof, in particular to a novel copper-based powder metallurgy aviation brake material. Background technique: [0002] The brake pair is a consumable part in the aircraft brake device, and it needs to be replaced about 3 to 4 times a year. Powder metallurgy aviation brake material is one of the key materials in the brake pair of large civil aircraft and military aircraft. Using the friction between the brake material and the dual material, the kinetic energy of the aircraft is converted into heat energy and other forms of energy, which are dissipated into the air, so that The braking device achieves the effect of braking. [0003] The Boeing 737 series aircraft is an important new generation of large-scale mainline aircraft in China at present and for a long time to come. Major domestic airlines have successively ordered a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00C22C1/05F16D69/00B22F3/14
Inventor 姚萍屏熊翔黄伯云汪琳易茂中张红波冯志荣白燕麟
Owner CENT SOUTH UNIV
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